Patents by Inventor Johannes ERFURT

Johannes ERFURT has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus and Method for Improved Video Quality Assessment
    Publication number: 20220303545
    Abstract: An apparatus for determining visual activity information for a predetermined picture block of a video sequence including a plurality of video frames, the plurality of video frames including a current video frame and one or more timely-preceding video frames, wherein the one or more timely-preceding video frames precede the current video frame in time, is provided. The apparatus is configured to receive the predetermined picture block of each of the one or more timely-preceding video frames and the predetermined picture block of the current video frame. Moreover, the apparatus is configured to determine the visual activity information depending on the predetermined picture block of the current video frame and depending on the predetermined picture block of each of the one or more timely-preceding video frames and depending on a temporal high-pass filter.
    Type: Application
    Filed: April 18, 2022
    Publication date: September 22, 2022
    Inventors: Christian HELMRICH, Sebastian BOSSE, Mischa SIEKMANN, Soeren BECKER, Johannes ERFURT, Heiko SCHWARZ, Detlev MARPE, Thomas WIEGAND
  • Adaptive in-loop filter with multiple feature-based classifications
    Patent number: 11297341
    Abstract: A decoder is described, which receives an encoded data stream. The encoded data stream includes data representing a picture and a classification mode parameter. The classification mode parameter specifies a certain classification to be applied to samples in the picture, the certain classification selected from a plurality of classifications. The decoder decodes the encoded data stream to obtain a reconstructed picture and the classification mode parameter, classifies samples of the reconstructed picture into one of a plurality of classes using the certain classification specified by the classification mode parameter, and filters the samples of the reconstructed picture. A sample is filtered using a filter for the class into which the sample has been classified.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: April 5, 2022
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Johannes Erfurt, Lim Wang-Q, Mischa Siekmann, Heiko Schwarz, Detlev Marpe, Thomas Wiegand
  • ADAPTIVE IN-LOOP FILTER WITH MULTIPLE FEATURE-BASED CLASSIFICATIONS
    Publication number: 20200366918
    Abstract: A decoder is described, which receives an encoded data stream. The encoded data stream includes data representing a picture and a classification mode parameter. The classification mode parameter specifies a certain classification to be applied to samples in the picture, the certain classification selected from a plurality of classifications. The decoder decodes the encoded data stream to obtain a reconstructed picture and the classification mode parameter, classifies samples of the reconstructed picture into one of a plurality of classes using the certain classification specified by the classification mode parameter, and filters the samples of the reconstructed picture. A sample is filtered using a filter for the class into which the sample has been classified.
    Type: Application
    Filed: August 6, 2020
    Publication date: November 19, 2020
    Inventors: Johannes ERFURT, Lim WANG-Q, Mischa SIEKMANN, Heiko SCHWARZ, Detlev MARPE, Thomas WIEGAND